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Old 03-14-2005, 12:51 PM   #1
greenvilledave
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clutch shaft question

I know this question has already been asked but I need to know how to make the clutch pivot shaft work when I have changed from a 250 three speed to a 350 with the three speed. The 350 does not have the casting or the bolt holes for the pivot ball thanks dave ps pictures would be great
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Old 03-14-2005, 01:39 PM   #2
OLDCHEV4X4
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I ran into this problem one time. The ball screws directly into the block. I had to drill and tap the engine block. Scarry stuff.
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Old 03-14-2005, 03:23 PM   #3
greenvilledave
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i don't remember but is there a large enough part of the casting to drill and tap that is accross from the frame point thanks dave
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Old 03-15-2005, 07:29 AM   #4
OLDCHEV4X4
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yes..Its right by the dip stick...if you have a driverside dipstick motor.
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72 k/10 short wideside
72 k/5 Blazer
72 K/5 Blazer - obstacle course racer
72 custom/10 8' bed
70 K/5 Blazer
67 C-30 GMC Flat bed
86 GMC K2500 Plow Truck
85 GMC K3500
84 M1008
85 M1008
77 G30 Motor Home
72 Sears 12hp Tractor
Glenmoore, Pennsylvania
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Old 03-15-2005, 09:34 AM   #5
greenvilledave
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ok I look at that last night by the way oldchev4x4 thanks for the help there is a casting that is threaded right accross from the frame point. Since I am not going to use the original six cylinder setup ever again can i take apart grind and thread one more thing the clutch shaft seems to be pretty close between these to points. then my son and i started to fit the headers into this area might be a problem thanks dave
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Old 03-15-2005, 01:13 PM   #6
OLDCHEV4X4
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I had to screw the ball in, then install the header , then install the Z bar clutch linkage. The arm on the Z bar would hit on the header when the clutch was pushed in, so i cut it off and welded it on where i needed it. Hope this helps.
I think the ball is different for a V8.
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72 k/10 short wideside
72 k/5 Blazer
72 K/5 Blazer - obstacle course racer
72 custom/10 8' bed
70 K/5 Blazer
67 C-30 GMC Flat bed
86 GMC K2500 Plow Truck
85 GMC K3500
84 M1008
85 M1008
77 G30 Motor Home
72 Sears 12hp Tractor
Glenmoore, Pennsylvania

Last edited by OLDCHEV4X4; 03-15-2005 at 03:46 PM.
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